论文标题
测量声模式的磁成分的分析研究
Analytical study on magnetic component of geodesic acoustic mode
论文作者
论文摘要
在陀螺仪框架下分析了测量声模式（GAM）的磁成分，并考虑了m = 1和m = 2谐波，其中m是poloidal模式数。有了准中性条件和安培定律，得出了各种多型磁成分的幅度。结果表明，M = 1和M = 2磁成分都存在，并分别由余弦和正弦组件主导。此外，发现所有磁成分的幅度相对于等离子体压力与磁压力\ b {eta}和安全因子Q的比率增加。最重要的是，由于磁性漂移频率与分布函数的第一和第二谐波的耦合，M = 1磁成分的振幅显着增强，因此在某些条件下可以与M = 2磁成分相当。
The magnetic components of geodesic acoustic mode (GAM) are analytically investigated under the gyrokinetic framework with both the m=1 and m=2 harmonics are considered, where m is the poloidal mode number. With the quasi-neutrality condition and Ampere's law, the amplitudes of various poloidal magnetic components are derived. It is shown that both m=1 and m=2 magnetic components exist and are dominated by the cosine and sine components, respectively. In addition, it is found that the amplitudes of all magnetic components increase with respect to the ratio of plasma pressure to magnetic pressure \b{eta} and safety factor q. Most importantly, the amplitude of m=1 magnetic component is significantly enhanced due to the coupling of magnetic drift frequency with the first and second harmonics of the distribution functions, thus it can be comparable to that of m=2 magnetic component under certain conditions.
